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Finding the Fourth Proportional to 486,974.80, 729,965.40 and 329,219.20

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Solution

The fourth proportional to 486,974.80, 729,965.40 and 329,219.20 is: 493,492.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,974.80 : 729,965.40 = 329,219.20 : x
  2. Step 2: Convert to fraction form
    486,974.80/729,965.40 = 329,219.20/x
  3. Step 3: Cross multiply
    486,974.80x = 729,965.40 × 329,219.20
  4. Step 4: Simplify right side
    486,974.80x = 240,318,625,015.68
  5. Step 5: Solve for x
    x = 240,318,625,015.68/486,974.80
  6. Step 6: Final answer
    x = 493,492.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.